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GCUK 08-09-2012 04:36 AM

2.7 accelerating smoke ??
Hi Guy's,

Now generally since I bought my jeep I just kinda cruise around in it. Just lately Ive had to hit the accelerator hard to overtake etc and noticed a puff of black smoke out the exhaust.
Is this normal for a deisel of this generation, or does something need looking at, Injector cleaner perhaps ?
Another question, every owners book for every car Ive ever owned says dont put additives in the fuel. Many owners say a shot of Injector cleaner has helped the car emmisions etc, including my wifes 2 deisels !


Martyp 08-10-2012 04:45 PM

Re: 2.7 accelerating smoke ??
If it is black smoke it is generally just unburnt fuel.

I'd take a look at the air filter and change it out if it is dirty, that is the general cause for it. Could also try BP Ultimate or Shell V-Power derv in the tank, which has injector cleaners in it.

GCUK 08-13-2012 11:09 AM

Re: 2.7 accelerating smoke ??
Air filter only has 5K on it, but I'll check it over.
Maybe try that expensive fuel next fill up !


jeeper_57 09-01-2012 12:38 PM

Re: 2.7 accelerating smoke ??
Hi usually when you hit the accelerator to overtake, it's common to have black smoke coming out of the exhaust ..
I have the 3.0 CRD also from Mercedes and I have the same , it's unburned fuel

Probably you have a small air leak in the fresh air system.. I've seen it on some 2.7..

Don't worry if it's when it's only during sudden accelerations :) I've already seen brand new cars with a puff of black smoke behind them when they overtake:lol:

I've heard that once when you use these kind of cleaners ,after that you need to use them quite often .. but I never used them

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